1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 package com.android.documentsui.sorting; 18 19 import android.annotation.StringRes; 20 import android.view.Gravity; 21 import android.view.Menu; 22 import android.view.MenuItem; 23 import android.view.View; 24 import android.widget.ImageView; 25 import android.widget.PopupMenu; 26 import android.widget.TextView; 27 28 import com.android.documentsui.R; 29 import com.android.documentsui.sorting.SortController.WidgetController; 30 import com.android.documentsui.sorting.SortDimension.SortDirection; 31 import com.android.documentsui.sorting.SortModel.SortDimensionId; 32 import com.android.documentsui.sorting.SortModel.UpdateType; 33 34 /** 35 * View controller for the sort widget in grid mode and in small screens. 36 */ 37 public final class DropdownSortWidgetController implements WidgetController { 38 39 private static final int LEVEL_UPWARD = 0; 40 private static final int LEVEL_DOWNWARD = 10000; 41 42 private final SortModel mModel; 43 private final View mWidget; 44 private final TextView mDimensionButton; 45 private final PopupMenu mMenu; 46 private final ImageView mArrow; 47 private final SortModel.UpdateListener mListener; 48 49 public DropdownSortWidgetController(SortModel model, View widget) { 50 mModel = model; 51 mWidget = widget; 52 53 mDimensionButton = (TextView) mWidget.findViewById(R.id.sort_dimen_dropdown); 54 mDimensionButton.setOnClickListener(this::showMenu); 55 56 mMenu = new PopupMenu(widget.getContext(), mDimensionButton, Gravity.END | Gravity.TOP); 57 mMenu.setOnMenuItemClickListener(this::onSelectDimension); 58 59 mArrow = (ImageView) mWidget.findViewById(R.id.sort_arrow); 60 mArrow.setOnClickListener(this::onChangeDirection); 61 62 populateMenuItems(); 63 onModelUpdate(mModel, SortModel.UPDATE_TYPE_UNSPECIFIED); 64 65 mListener = this::onModelUpdate; 66 mModel.addListener(mListener); 67 } 68 69 @Override 70 public void setVisibility(int visibility) { 71 mWidget.setVisibility(visibility); 72 } 73 74 @Override 75 public void destroy() { 76 mModel.removeListener(mListener); 77 } 78 79 private void populateMenuItems() { 80 Menu menu = mMenu.getMenu(); 81 menu.clear(); 82 for (int i = 0; i < mModel.getSize(); ++i) { 83 SortDimension dimension = mModel.getDimensionAt(i); 84 if (dimension.getSortCapability() != SortDimension.SORT_CAPABILITY_NONE) { 85 menu.add(0, dimension.getId(), Menu.NONE, dimension.getLabelId()); 86 } 87 } 88 } 89 90 private void showMenu(View v) { 91 mMenu.show(); 92 } 93 94 private void onModelUpdate(SortModel model, @UpdateType int updateType) { 95 final @SortDimensionId int sortedId = model.getSortedDimensionId(); 96 97 if ((updateType & SortModel.UPDATE_TYPE_VISIBILITY) != 0) { 98 updateVisibility(); 99 } 100 101 if ((updateType & SortModel.UPDATE_TYPE_SORTING) != 0) { 102 bindSortedDimension(sortedId); 103 bindSortDirection(sortedId); 104 } 105 } 106 107 private void updateVisibility() { 108 Menu menu = mMenu.getMenu(); 109 110 for (int i = 0; i < menu.size(); ++i) { 111 MenuItem item = menu.getItem(i); 112 SortDimension dimension = mModel.getDimensionById(item.getItemId()); 113 item.setVisible(dimension.getVisibility() == View.VISIBLE); 114 } 115 } 116 117 private void bindSortedDimension(@SortDimensionId int sortedId) { 118 if (sortedId == SortModel.SORT_DIMENSION_ID_UNKNOWN) { 119 mDimensionButton.setText(R.string.not_sorted); 120 } else { 121 SortDimension dimension = mModel.getDimensionById(sortedId); 122 mDimensionButton.setText(dimension.getLabelId()); 123 } 124 } 125 126 private void bindSortDirection(@SortDimensionId int sortedId) { 127 if (sortedId == SortModel.SORT_DIMENSION_ID_UNKNOWN) { 128 mArrow.setVisibility(View.INVISIBLE); 129 } else { 130 final SortDimension dimension = mModel.getDimensionById(sortedId); 131 switch (dimension.getSortDirection()) { 132 case SortDimension.SORT_DIRECTION_NONE: 133 mArrow.setVisibility(View.INVISIBLE); 134 break; 135 case SortDimension.SORT_DIRECTION_ASCENDING: 136 showArrow(LEVEL_UPWARD, R.string.sort_direction_ascending); 137 break; 138 case SortDimension.SORT_DIRECTION_DESCENDING: 139 showArrow(LEVEL_DOWNWARD, R.string.sort_direction_descending); 140 break; 141 default: 142 throw new IllegalStateException( 143 "Unknown sort direction: " + dimension.getSortDirection() + "."); 144 } 145 } 146 } 147 148 private void showArrow(int level, @StringRes int descriptionId) { 149 mArrow.setVisibility(View.VISIBLE); 150 151 mArrow.getDrawable().mutate(); 152 mArrow.setImageLevel(level); 153 mArrow.setContentDescription(mArrow.getContext().getString(descriptionId)); 154 } 155 156 private boolean onSelectDimension(MenuItem item) { 157 final @SortDirection int preferredDirection = mModel.getCurrentSortDirection(); 158 159 final SortDimension dimension = mModel.getDimensionById(item.getItemId()); 160 final @SortDirection int direction; 161 if ((dimension.getSortCapability() & preferredDirection) > 0) { 162 direction = preferredDirection; 163 } else { 164 direction = dimension.getDefaultSortDirection(); 165 } 166 167 mModel.sortByUser(dimension.getId(), direction); 168 169 return true; 170 } 171 172 private void onChangeDirection(View v) { 173 final @SortDimensionId int id = mModel.getSortedDimensionId(); 174 assert(id != SortModel.SORT_DIMENSION_ID_UNKNOWN); 175 176 final SortDimension dimension = mModel.getDimensionById(id); 177 mModel.sortByUser(dimension.getId(), dimension.getNextDirection()); 178 } 179 } 180
